XO is a roguelike fleet RTS blending real time with pause tactical action and choose-your-own adventure narrative. Take command of the last battleship, gather a fleet and try to unite five hostile factions in a desperate bid to save humanity from an unbeatable enemy.
The carrier is essentially an enormous fuel tank and a big interstellar drive with attachment points for other ships. Oh yeah, and a big cage for captured humans. The carrier itself is weak, though it holds hundreds of small swarm fighters and the powerful harvester.